Hydrophobic, flexible electromagnetic interference shielding films derived from hydrolysate of waste leather scraps

Dangge Gao; Shihao Guo; Yingying Zhou; Bin Lyu; Jianzhong Ma; Ping Zhao; Dingjie Pan; Shaowei Chen

doi:10.1016/j.jcis.2022.01.043

Hydrophobic, flexible electromagnetic interference shielding films derived from hydrolysate of waste leather scraps

J Colloid Interface Sci. 2022 May:613:396-405. doi: 10.1016/j.jcis.2022.01.043. Epub 2022 Jan 10.

Authors

Dangge Gao¹, Shihao Guo², Yingying Zhou³, Bin Lyu², Jianzhong Ma⁴, Ping Zhao², Dingjie Pan⁵, Shaowei Chen⁶

Affiliations

¹ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; National Demonstration Center for Experimental Light Chemistry and Engineering Education (Shaanxi University of Science &Technology), Xi'an 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Xi'an 710021, China. Electronic address: dangge2000@126.com.
² College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; National Demonstration Center for Experimental Light Chemistry and Engineering Education (Shaanxi University of Science &Technology), Xi'an 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Xi'an 710021, China.
³ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Xi'an 710021, China.
⁴ College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; National Demonstration Center for Experimental Light Chemistry and Engineering Education (Shaanxi University of Science &Technology), Xi'an 710021, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Xi'an 710021, China. Electronic address: majz@sust.edu.cn.
⁵ Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 96064, USA.
⁶ Department of Chemistry and Biochemistry, University of California, 1156 High Street, Santa Cruz, CA 96064, USA. Electronic address: shaowei@ucsc.edu.

PMID: 35042037
DOI: 10.1016/j.jcis.2022.01.043

Abstract

With the rapid development of wireless telecommunication technologies, it is of fundamental and technological significance to design and engineer high-performance shielding materials against electromagnetic interference (EMI). Herein, a three-step procedure is developed to produce hydrophobic, flexible nanofiber films for EMI shielding and pressure sensing based on hydrolysate of waste leather scraps (HWLS): (i) electrospinning preparation of HWLS/polyacrylonitrile (PAN) nanofiber films, (ii) adsorption of silver nanowires (AgNWs) onto HWLS/PAN nanofiber films, and (iii) coating of HWLS/PAN/AgNWs nanofiber films with polydimethylsiloxane (PDMS). Scanning electron microscopy studies show that AgNWs are interweaved with HWLS/PAN nanofibers to form a conductive network, exhibiting an electrical conductivity of 10⁵ S m^-1 and shielding efficiency of 65 dB for a 150 μm-thick HWLS/PAN/AgNWs film. The HWLS/PAN/AgNWs/PDMS film displays an even better electromagnetic shielding efficiency of 80 dB and a water contact angle of 132.5°. Results from this study highlight the unique potential of leather solid wastes for the production of high-performance, environmentally friendly, and low-cost EMI shielding materials.

Keywords: Electromagnetic interference shielding; Electrospinning; Hydrolysate of waste leather scrap; Nanofiber film; Pressure sensor.